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Most Popular Best Selling Products of Hex Head Self Drilling Roofing Screws. Custom Logo Service: We provide logo customization services upon request. Wide Material Options: Available in C1022, Q195, Q235, 45#, 55#, and 22A carbon steel. Flexible Thread Types: Offer both fine thread and coarse thread options. Diverse Surface Treatment: Available in white zinc plated and yellow zinc plated finishes. Customized Design: ODM and OEM services are welcome for customized designs. Multiple Packing Options: Options include color box, wooden box, small carton, and woven bags. Fast Response Time: We reply to inquiries within 24 working hours. Experienced Manufacturer: Production manager has over 15 years of experience in screws.